Re: Lenovo x200 bios



Hello! Can you give the BIOS password? It helped to boot machine, but asks password to enter BIOS......

Re: Intel DX 79 SI desktop board bios request



Thanks a lot, got motherboard back to live ...

Re: Enermax Platimax EPM1500EGT random turn on



Hello! I`m having troubles with not turning on and klicking sounds with the Enermax PSU. Can you please share info, what resistor did You replaced?
Thank You!...

Re: No Power Dell U2410 Monitor

Hi again.
So are there any advice on what to look for?

Re: No Power Dell U2410 Monitor

Unspun01
Thanx for your reply.
I forgot to say, that L7575 is already replaced, as I suspected it also, but no result.
So: L7575, SG6901 and R853 are new.
I`m confused by the pulsing of PFC transistor gate impulses. Why is PFC output is terminated? I suspect it`s some protection, but which? As it is PFC and PWM combined controller, then PWM circuit is also affected. So the backlight is flashing the same rhythm, as PFC...

Re: No Power Dell U2410 Monitor

No ideas? Anybody...

Re: No Power Dell U2410 Monitor

Hi guys!
I have this DELL monitor at repair desk.
R853 (15Ohm) was dead and also GD6901. After replacing them both I got power, monitor responce to the buttons. But the problem is with PFC system, as it is pulsing. I get 330...380VDC (230VAC in power socket) on C854. I have checked feedback and over voltage circuits, all seems fine, but they are pulsing all together, as main voltage is not stable.
Checked with oscilloscope the outgoing PFC signal to the Gate of Q853 and saw, that the impulses are terminated and looks like this:...